Title says it all, I need to prepare emergency folder on my storage device of games I could enjoy without installing them and preferably without registers (think of as if I were using it on pretty much blank pc with just windows installed). Any help is good.

Well the easiest ones are probably the DOSBox and ScummVM (compatible) games.

Pretty much covered here but even then, what kind of games would you want to play on this portable storage?

Mostly time wasters, as in games like Fallout wouldnt be bad but not exactly what I had in mind. More of Tycoon games (for example Kerbal Space Program works this way, from storage, and its perfect for my purposes, but I need more variety)

Jagged Alliance 2 works from a usb stick. Throw 1.13 over it, and waste your time ;)

Actually, I've found out that a fair many games work portably. Once a crack has removed the necessity for CD checks, and the need for a registry key pointing to the CD drive, most will work from anywhere. They might create their own entries upon running, but for the most part, the easiest way is to copy the folder and see if it runs.

Yeah, for example HoMM 3 is not ideal because of the needed register issues, I will see if it can be resolved by what Spinorial says. Thank you for tips, but more are welcome.

Spelunky! It's very good and replayable, and you don't need to install it.